former congresswoman gabrielle giffords of arizona was led by the hand by her husband, mark kelly. it was two years ago this month that giffords was shot through the head during a meeting in tucson. 18 others were shot and six died. a day of testimony began with this: >> speaking is difficult, but i need to say something important. violence is a big problem. too many children are dying. too many children. we must do something. it will be hard, but the time is now. you must act. be bold. be courageous. americans are counting on you. thank you. >> pelley: giffords, who is partially blind, resigned from congress last year. the rest of today's hearing featured gun control advocates and opponents, and our nancy cordes was there. >> reporter: at one end of the witness table was gabrielle giffords' husband. at the other was the c.e.o.st national rifle association, wayne lapierre, who argued new gun laws are nun necessary. >> the fact is we could dramatically cut crime in this country with guns and save lives all over this country if we would start enforcing the 9,000 federal laws we have